diff --git a/wp-includes/taxonomy.php b/wp-includes/taxonomy.php
index 02d11d84c4..aea2efa061 100644
--- a/wp-includes/taxonomy.php
+++ b/wp-includes/taxonomy.php
@@ -284,10 +284,10 @@ function is_taxonomy_hierarchical($taxonomy) {
  *
  * Note: Do not use before the {@see 'init'} hook.
  *
- * A simple function for creating or modifying a taxonomy object based on the
- * parameters given. The function will accept an array (third optional
- * parameter), along with strings for the taxonomy name and another string for
- * the object type.
+ * A simple function for creating or modifying a taxonomy object based on
+ * the parameters given. If modifying an existing taxonomy object, note
+ * that the `$object_type` value from the original registration will be
+ * overwritten.
  *
  * @since 2.3.0
  * @since 4.2.0 Introduced `show_in_quick_edit` argument.
diff --git a/wp-includes/version.php b/wp-includes/version.php
index be5a1a2f1d..068c764af0 100644
--- a/wp-includes/version.php
+++ b/wp-includes/version.php
@@ -4,7 +4,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '4.9-alpha-41279';
+$wp_version = '4.9-alpha-41280';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.